There is no maintainer for this port.Any concerns regarding this port should be directed to the FreeBSD Ports mailing list via ports@FreeBSD.orgPort Added:06 Mar 2011 22:11:22Also Listed In:ipv6tkmboneLicense: not specified in port

RAT is a network audio tool that allows users to particpate in
audio conferences over the internet. These can be between two
participants directly, or between a group of participants on a
common multicast group. RAT features sender based loss mitigation
mechanisms and receiver based audio repair techniques to compensate
for packet loss, and load adaption in response to host performance.
WWW: http://www-mice.cs.ucl.ac.uk/multimedia/software/rat/

Mark the previous mbone/ ports (minus 2) as:
DEPRECATED= Unmaintained, anachronistic, mail freebsd-ports@FreeBSD.org if
interested
EXPIRATION= 2011-06-30
For audio/xspeakfree:
DEPRECATED= Unmaintained, unfetchable, mail freebsd-ports@FreeBSD.org if
interested
For multimedia/vic a PR was filed
Unfortunately, IPv4 multicast is very nearly a thing of the (distant) past.
None of these ports are maintained, almost all of them are not up to date
with the latest versions, most of which were released many years ago.
Approved by: portmgr (pav)